化学
碱度
磷
环境化学
化学需氧量
硝化作用
钙
磷酸盐
胞外聚合物
氮气
废水
反硝化
生物矿化
异养
降水
环境工程
细菌
生物化学
化学工程
有机化学
生物
环境科学
生物膜
物理
气象学
工程类
遗传学
作者
Wenshuo Yang,Liang Xu,Zhao Wang,Kai Li,Ruizhu Hu,Junfeng Su,Lingfei Zhang
标识
DOI:10.1016/j.biortech.2022.127996
摘要
Pseudomonas sp. Y1, a strain with superior synchronous removal ability of ammonia nitrogen (NH4+-N), phosphate (PO43--P), and calcium (Ca2+) was isolated, with the removal efficiencies of 92.04, 99.98, and 83.40 %, respectively. Meanwhile, the chemical oxygen demand (COD) was degraded by 90.33 %. Through kinetic analysis, the optimal cultivated conditions for heterotrophic nitrification-aerobic denitrification (HNAD) and biomineralization were determined. The growth curves experimental results of different nitrogen sources indicated that strain Y1 could remove NH4+-N through HNAD. The results of excitation-emission matrix (EEM) proved that the appearance of extracellular polymeric substances (EPS) promoted the precipitation of phosphate minerals. Finally, the characterization results of the bioprecipitates showed that the HNAD process produced the alkalinity required for microbial induced calcium precipitation (MICP), resulting in the removal of PO43- via adsorption and co-precipitation. This study provides a theoretical basis for the application of microorganisms to achieve synchronous nutrient removal and phosphorus recovery in wastewater.
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